monson



June 18, 1929.

M. B. MoNsoN 1.717.804

PLOW

Filed Jan. 2, 1928 2 Sheets-Sheet 1 18, 1929. A M B MONSQN 1,717,804

PLOW

FiledvJan. 28, 1928 2 Sheets-Sheet 2 at their upper extremities withloose levers 38 which are free to rotate upon a plow lift shaftd whichis carried in brackets from the cross frame 20. The plow lift shaft 34carries two parallel lifting arms 35 one of which extends adjacent eachvof the lifting levers 33 so as to Contact with projections 35 upon thelatter.

The plow lift shaft 34, is rotated by the rotation of the tractor wheelslO by means of the following mechanism: r drum 87 is secured to one ofthe tractor wheels, lO preferably the left wheel as illustrated. rllhedrum 3? comprises two separated discs joined by means of, what might betermed, teeth 88. On the outer face of the outer disc, projections 39are formed, which are spaced so as to pass between the spokes of thetractor wheel. @n the inside of the tractor wheel two semi-circularyplates l0 are secured to the projections 39 by means of bolts Ll1 andact to clamp the drum 37 to the wheel so that it will revolve therewith.

On the rear axle housing` ll, adjacent the drum a bracket 42 is securedwhich supports one extremity of the plow shaft 3ft and also supports a`spring lever 43. The extremity ofthe plow lift shaft Sel is turned at anangle to form a lever 44, on the extremity of which, a hook shaped. pawl1-5 is hinged at 46. One extremity of the spring lever l2-l is carriedanc passes through an ear d? on the pawl The other extremity of thespring lever is carried in a bracket i8 from the cross frame 20, whichalso sup aorts the plow lift shaft 49. rlhis latter extremity of thespring lever is bent so as to return parallel to itself under Jthebracket 4:8 and then extends upwardly to form a. pawl engaging lever 50.A spring 5l extends'between the sprir lever 43 anda spring post 52 andacts to constantly maintain the spring` lever against the bottom of thebracket 4S. The pawl l5 is arranged directly over the teeth 38 in thedrum 37.

. liet us assume that the lefthaind plow beam 2l. is down so that itsplow is in. engagement with the ground, as illustrated in l, and that itis desired to lift this plow. rlhe pawl Ll5 isnow in the positionindicated at D, Fig. 5. 'l` he operator forces the pawl engaging` lever50 forwardly against the action of the sprine:k 51, .this causing theextremity of the spring lever .l-3 to force the pawl el downwardly sothat its hooked-shaped extremity will pass into the drum 87 between twoofthe teeth 38 as indicated by position A, Fig. 5. The rotatingl drumwill cause one of the teeth 38 to Aengage the bolt 45, the friction ofthe engagement acting to maintain the pawl` in place after the lever 50has been released. As the drum rotates it will draw the pawl forwardlyand the pawl in turn will draw the lever ll forwardly so as to rotatethe plow lift share Sfr, to engage the projection 36 of the left looselever 33 and turn that lever 33 upwardly so as to raise the plow beam2li by means of the link 32. The plow beam upon reaching the (ilesiredelevation wil be locked in place by means of a latch mechanism to belater described.

lllhen the plow has reached its desired elcvation. thc periphery of thedrum 37 will contact with the pawl 4:5 and force its hooked cxtremityout of engagement with the teeth 3S as uhown in position B, Fig. 5. 5lwill now act to snap the spring` lever i3 upv-fardly so as to raise Vthepawl to the position C, Fig. 5. thus entirely releasinpr the lifting;mechanism. lllhe lifting); mechanism rem in 'the position C until it isdesired to drop one of the plows. rlhc plow in dropping will pull thelitt sha. illback to its pull the pawl former position and in turn ha fkinto position D, Fig'. 5.

rl'he depth of the plowing is of course regi'ulated by the height of theforward extremity of the plow beam. This Van be regulated by means of a`depth lever which is carried on a shaft extending across 'thetransmissimi case Bil, carried in a` pair of brackets sccurcd to thetransr. .sion case bolts, already in place. rllhe lever is maintained iuany desired position by means of a sector :7G supn rt l .soin a lu'acket57 from thelixed frame 2l). the shaftl carries two Ytfnwardly projectingarn'is 58. from cach of which depends a of linls 59 cornecting.;` withthc forward estremi y of the olow boanu 2l and L25. Thus, by drawing thelever rearwardly the forward extremities of the plow beams are raisedand by forcing` the lever forward, the` forward extremities of the plowbeams are lowered. rllhis piovides an eli'icient and easily operateddepth a dj ustmcnt.

A latch mechanism for molding` the plow beams in the raised position iscarried by cach of the slides 30. lflach latch mechanism comprises a.latch lever (lil, pivetcd to one o t the slide bolts rs indicated at(l2. Fig. l. 'llu latch lever 63 has a pointed extremity tt' adapted toengage in notches (i8 in a hanging)` latch ba The latch bar ($9 and thelatch lever t?) are heldV inV placeI by a cross bar (35 secured to theslide ll. .i springl (l5 is compressed between the extremity of thecrossbar (36 and a head G0 formed on a spring bolt (il. rllhe otherextremity of the bolt (il is carried in a clip 6l upon the latch lever(33. This allows the pointed extremity o f thc latch lever to ride uponthe latch bur (lll until one of the notches GS is reached. rllhe spring`(35 will then pull the latch bar down causingiA its pointed extremity toenter the notch and support the plow beam. To release the plow, thelatch lever G3 is lifted to the broken line position of 3, whichreleases its extremity GT from its notch.

lllhile a specific f rm of the imjn'ovcment has been described andillustrated herein. it is desired to be understood that the same mayrlhe spring;

l (l fi lili) be varied, within the scope of the appended claims,withont departing from the spirit of the invention.

Having thus described the invention, what I claim and desire secured byLetters Patent is j l. Means for lifting the rearward extremities ofplow beams which are pivoted adjacent their forward extremities to astrncture supported on wheels, comprising a shaft; levers looselymounted on said shaft; links connectin the extremities of said leverswith said plow beams; second levers fixed to said shaft and adapted,when saidfshaft is rotated, to Contactl with said first levers and liftsaid plow beams and means for rotating said shaft.

Q. Means for lifting the rearward extremities of plow beams which arepivoted adjacent their forward extremities to a structure supported onwheels, comprising a .shaft levers loosely mounted on said shaft; linksconnecting the extremities of said levers with said plow beams; secondlevers fixed to said shaft and adapted, when said shaft is rotated, tocontact with said first levers and llift said plow beams; means forrotating said shaft; said means comprising a toothed, eircular memberadapted to be secured to one of said wheels; a third fixed leverprojecting from said shaft; a hook shaped pawl hinged to the extremityof said third lever; and means for bringing said pawl into engagementwith the teeth of said circular member so that rotation of said wheelwill cause said pawl to operate said third lever and rotate said shaft.

2l. Means for lifting the rearward extremities of plow beams which arepivoted adjacent their forward extremities to a structure supported onwheels comprising a shaft; levers loosely mounted on said shaft; linksconnecting the extremities of said levers with said plow beams; secondlevers fixed to said shaft and adapted, when said shaft is rotated, tocontact with said first levers and lift said plow beams; means forrotating said shaft, said means comprising` a toothed, circular memberadapted to be secured to one of said wheels; a third fixed leverprojecting from said shaft; a hoolr shaped pawl hinged to the extremityof said third lever; means for bri nging said pawl into engagement withthe teeth of said circular member so that rotation of said wheel willcause said pawl to operate said third lever and rotatesaid shaft; and aprojecting surface on said circular member adapted to force said pawlout of engagement with said teeth after said shaft has been rotated.

il. Means for lifting the rearward extremities of plow'beams which arepivoted adjacent their forward extremities to a structure supported onwheels comprising a shaft; levers loosely mounted on said shaft; linksconnecting the extremities of said levers with said plow beams; secondlevers fixed to said shaft and adapted, when said shaft is rotated, tocontact with said first levers and lift said plow beams; `means forrotating said shaft; said means comprising a toothed, circular memberadapted to be secured to one of said wheels; a third fixed leverprojecting from said shaft; a hook shaped pawl hinged to the extremityof said third lever; means for bringingl said pawl into ene'agement withthe teeth of said circular member so that rotttion of said wheel willcause said pawl to operate said third lever and rotate said shaft, saidmeans con'iprising a spring lever terminating at its one extremity in ahandle and at its other extremity in an arm in engagement with saidpawl; and a spring acting to force said pawl away from said circularmemberso that manual operation of said handle will be required to forcesaid pawl into engagement therewith.

5. A plow adapted to be carried by an automotive wheeled structurecomprising plow beams hinged to said structure at their forwardextremities, arcuated guides carried by said structure; slides carriedby said plow beams an d; adapted'to travel along said guides when saidplows are raised; means for raising the rearward extremities of saidplow beams comprising a transverse shaft carried by said structure;fixed levers projecting from said shaft; loose levers carrii-n'l by saidshaft; projections on said loose levers adapted to be contacted with bysaid fixed levers; links connectingl said'loose levers with said plowbeams; latch mechanism adapted to maintain said plow beams in anelevated position; and means for rotating said shaft so as to raise anyplow beam which is in lowered position by Contact between said fixedlevers and said projections.

6. A plow adapted to be carried by an automotive wheeled structure,comprising plow beams hinged to said structure at their forwardextremities; arcuated guides carried by said structure; slides carriedby said plow beams and adapted to travel along said guides when saidplows are raised; means for raising the rearward extremities of saidplow beams, comprising a. transverse shaft carried by said structure;fixed levers project-- ing from said shaft; loose levers carried by saidshaft; projections on said loose levers adapted to be contacted with bysaid fixed levers; links connecting said loose levers with said plowbeams; latch mechanism adapted tomaintain said plow beams in an elevatedposition; means for rotating said shaft so as to cause ,Contact betweensaid fixed levers and said projections; said means comprising a pawlhinged to the extremity of one of said fixed levers adjacent one of saidwheels; a drum adapted to be secured to said wheel; projections in saiddrum; and means for CII bringing said pawl into engagement; with saidproj ections so that rotation of said wheel willcause said pawl torotate said shaft.

7. A plow adapted to be carried by an automotive wheeled structure;comprising plow beams hinged to lsaid structure at their forwardextremities; arcuated guides carried by said structure; slides carriedby said plow beams and adapted to travel along said guides when saidplows are raised; means for raising the rearward extremities of saidplow beams, comprising a transverse shaft car ried by said structure;ixed levers projecting from said shaft; loose levers carried by saidshaft; projections on said loose levers adapted to be contacted with bysaid fixed levers; links connecting` said loose levers with said plowbeams; latch mechanism adapted to maintain said plow beams in anelevated position; means for rotating said shaft so as to cause contactbetween. said lixed levers and said projections, said means comprising apawl hinged to the extremity of one of said fixed levers adjacent one ofsaid wheels; a drum adapted to be secured to said wheel; projections insaid drum; means for bringing said pawl into engagement with said pro-ljections so that rotation of said wheel will cause said pawl to rotatesaid shaft.y said latter means comprising a second shaft; a handleprojecting upwardly from said second shaft; an arin projecting from saidsecond shaft through an opening in said pawl; a spring operativelyconnected Yto said second shaft so as to cause said arm to hold saidpawl out of engagement with said projections and to allow said arm toforce said pawl into engagement with saidy projections when said handleis operated; and automatic means for forcing said pawl out of engagementwhen rotation of said shaft has been accomplished. i

8. In a plow of the type having plow beams carried on wheels7 means forraising said plow beams by the rotation of said wheels con'iprising: acircular' toothed structure secured to said wheels; a relatively longhooksliaped pawl adapted to extend partially over said tooth structure;means for causing said pawl to engage one of the teeth therein7 thesurface of said structure. acting to force said pawl out of engagementwhen said structure has rotated a predetermined distance; an operableconnection between said hook-shaped pawl and said plow beams; a lever'slidably supporting the free extremity of said hookshaped pawl; andmeans for operating said lever so as to cause said pawl to engage saidtooth and spring means by operating said lever so as to maintain saidpawl out of engagement with said teeth.

9. Means for operating a plow raising mechanism from the plow supportingwheels eon'iprising: drums; projections on said drums arranged to extendbetween the spokes ot' nd wheels; elai'nping plates adapted to extendbetween said projections so as to clamp said drum to said spokes; andcross liars on the periphery of said drinn adapted to forni ratchetteeth.

l0. ln a wheeled plow7 means for supporting the plow beam in the raisedposition comprising: a substantially vertical. arcuate notched member; apivoted lever arranged to inove with said plow beam; a pointed extremityon said lever arranged to engage said notches; means tor movement ofsaid lever' in one direction to maintain said pointed extremity inengagement with said notches; and spring means arranged to allowmovement of said lever in the other direction to release it fromengagement.

ln testimony whereo f, l affix my signature.

MARTIN B. MONSON.

